span.button {line-height:0; width:16px; height:16px; display: inline-block; vertical-align:middle;
	border:0 none; cursor: pointer;outline:none;
	background-color:transparent; background-repeat:no-repeat; background-attachment: scroll;
	background-image:url("images/zTreeStandard.png"); *background-image:url("images/zTreeStandard.gif")}
span.button.chk {width:13px; height:13px; margin-right:5px;cursor: auto}
span.button.chk.checkbox_false_full {background-position:0 0}
span.button.chk.checkbox_false_full_focus {background-position:0 -14px}
span.button.chk.checkbox_false_part {background-position:0 -28px}
span.button.chk.checkbox_false_part_focus {background-position:0 -42px}
span.button.chk.checkbox_false_disable {background-position:0 -56px}
span.button.chk.checkbox_true_full {background-position:-14px 0}
span.button.chk.checkbox_true_full_focus {background-position:-14px -14px}
span.button.chk.checkbox_true_part {background-position:-14px -28px}
span.button.chk.checkbox_true_part_focus {background-position:-14px -42px}
span.button.chk.checkbox_true_disable {background-position:-14px -56px}